These parties were raising such demand when Jayalalithaa's earlier actions have been suggestive of her seeing Sasikala as political heir, senior AIADMK leader and its spokesperson C Ponnaiyan said.
DMK leader M K Stalin and PMK founder S Ramadoss, both of whom had sought a white paper yesterday, did not belong to his party, he told reporters.
"Ramadoss is not the one who doesn't know it, Opposition Leader Stalin is not the one who is not aware of it."
Such demands are coming amid growing chorus for Sasikala to take over the reins of the party, he said.
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There is no need to give credence to such demands for white paper, he said.
Stalin and Ramadoss had yesterday sought a white paper on Jayalalithaa's medical treatment amid the succession issue in AIADMK following her demise.
Ponnaiyan, speaking outside the Poes Garden residence where the late AIADMK supremo's "13th day" of her death was observed, showed a purported 1991 investment document of the former Chief Minister, wherein, he said, Jayalalithaa had mentioned Sasikala as the "nominee" in it.
Jayalalithaa had made an investment of Rs seven lakh with a private firm and had mentioned her close confidante as "nominee" and "this can be suggested to show that she saw her (Sasikala) as her political heir then itself," Ponnaiyan asserted.
He charged the opposition parties with carrying out an online campaign against Sasikala.
Sasikala may not have responded to the calls to take over leadership of AIADMK but pleas in this regard keep mounting, Ponnaiyan said.
On today's congregation of party MLAs and Ministers at Poes Garden, he said they had come to pay condolences at Jayalalithaa's "13th day" ceremony following her demise on December 5.